note

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

/* load instructions */

	LDSB		MOVB	x, R
	LDSBA		MOVB	x, R, asi
	LDSH		MOVH	x, R
	LDSHA		MOVH	x, R, asi
	LDUB		MOVBU	x, R
	LDUBA		MOVBU	x, R, asi
	LDUH		MOVHU	x, R
	LDUHA		MOVHU	x, R, asi
	LD		MOVW	x, R
	LDA		MOVW	x, R, asi
	LDD		MOVD	x, R
	LDDA		MOVD	x, R, asi

note: x is (R+R) or offset(R)
note: MOVD is a bad name, means double word

/* load floating */

	LDF		MOVF	x, FR
	LDDF		MOVD	x, FR
	LDFSR		MOVW	x, FPSR

note: MOVF maybe is MOVW

/* load coprocessor */

	LDC		MOVW	x, CR
	LDDC		MOVD	x, CR
	LDCSR		MOVW	x, CPSR

/* store */

	STB		MOVB	R, x
	STBA		MOVB	R, x, asi
	STH		MOVH	R, x
	STHA		MOVH	R, x, asi
	ST		MOVW	R, x
	STA		MOVW	R, x, asi
	STD		MOVD	R, x
	STDA		MOVD	R, x, asi

/* store floating *

	STF		MOVF	FR, x
	STDF		MOVD	FR, x
	STFSR		MOVW	FPSR, x
	STDFQ		MOVD	FPQ, x

note: STDFQ gok

/* store coprocessor */

	STC		MOVW	CR, x
	STDC		MOVD	CR, x
	STCSR		MOVW	CPSR, x
	STDCQ		MOVD	CPQ, x

/* atomic load/store */

	LDSTUB		TAS	x
	LDSTUBA		TAS	x, asi

/* swap */

	SWAP		SWAP	R, x
	SWAPA		SWAP	R, x, asi

/* calc */

	ADD		ADDW	y,R, R
	ADDcc		ADDWT	y,R, R
	ADDX		ADDC	y,R, R
	ADDXcc		ADDCT	y,R, R
	TADDcc
	TADDccTV
	SUB
	SUBcc
	SUBX
	SUBXcc
	TSUBcc
	TSUBccTV
	MULScc
	AND
	ANDcc
	ANDN
	ANDNcc
	OR
	ORcc
	ORN
	ORNcc
	XOR
	XORcc
	XNOR
	XNORcc
	SLL
	SRL
	SRA

note: y is R or $simm13

/* sethi */

	SETHI		MOVW	$c, R		/* high 22 bits */

/* save/restore (same as add) */

	SAVE		SAVE	y,R, R
	RESTORE		RESTORE	y,R, R

/* branch on cc */

	BA
	BN
	BNE
	BE
	BG
	BLE
	BGE
	BL
	BGU
	BLEU
	BCC
	BCS
	BPOS
	BNEG
	BVC
	BVS

note: annul bit?

/* branch on fcc */

	FBA
	FBN
	FBU
	FBG
	FBUG
	FBL
	FBUL
	FBLG
	FBNE
	FBE
	FBUE
	FBGE
	FBUGE
	FBLE
	FBULE
	FBO

note: annul bit?

/* branch on coprocecssor cc */

	CBA
	CBN
	CB3
	CB2
	CB23
	CB1
	CB13
	CB12
	CB123
	CB0
	CB03
	CB02
	CB023
	CB01
	CB013
	CB012

note: annul bit?

/* call */

	CALL
	JAL	x, R

/* return from trap */

	RETT	x

/* trap on integer cc */

	TA
	TN
	TNE
	TE
	TG
	TLE
	TGE
	TL
	TGU
	TLEU
	TCC
	TCS
	TPOS
	TNEG
	TVC
	TVS

/* read state register */

	RDY		MOVW	Y, R
	RDPSR		MOVW	PSR, R
	RDWIM		MOVW	WIM, R
	RDTBR		MOVW	TBR, R

/* write state register */

	WRY		MOVW	R, Y
	WRPSR		MOVW	R, PSR
	WRWIM		MOVW	R, WIM
	WRTBR		MOVW	R, TBR

/* unimplemented */

	UNIMP	$C22

/* instruction cache flush */

	IFLUSH	x

/* floating op */

	FiTOs
	FiTOd
	FiTOx

	FsTOi
	FdTOi
	FxTOi

	FsTOd
	FsTOx
	FdTOs
	FdTOx
	FxTOs
	FxTOd

	FMOVs
	FNEGs
	FABSs

	FSQRTs
	FSQRTd
	FSQRTx

	FADDs
	FADDd
	FADDx
	FSUBs
	FSUBd
	FSUBx

	FMULs
	FMULd
	FMULx
	FDIVs
	FDIVd
	FDIVx

	FCMPs
	FCMPd
	FCMPx
	FCMPEs
	FCMPEd
	FCMPEx

/* coprocessor op */

	CPop1
	CPop2